Multi-layer circuit board having ground shielding walls
First Claim
Patent Images
1. A circuit board, comprising:
- a plurality of dielectric layers;
a plurality of signal lines; and
a plurality of shielding walls, separated by the plurality of dielectric layers and disposed between the signal lines, wherein each shielding wall comprises;
an upper surface;
a lower surface opposite to the upper surface;
a groove extending from the upper surface toward the lower surface, wherein each of the plurality of signal lines extends along a longitudinal direction parallel to a longitudinal axis of the groove of each shielding wall without extending within the groove of each shielding wall;
a first metal layer disposed on the upper surface, wherein the first metal layer and the plurality of signal lines are located at a same layer;
a second metal layer disposed inside the groove and electrically connecting to the first metal layer;
a middle metal layer disposed between the upper surface and the lower surface, wherein the second metal layer electrically connects the first metal layer to the middle metal layer; and
wherein the first metal layer is a ground shielding layer or a power shielding layer.
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Abstract
A circuit board includes a plurality of signal lines and a plurality of shielding walls. The shield walls are disposed between the signal lines. Each shield wall includes an upper surface, a lower surface, a rectangular groove, a first metal layer and a second metal layer. The lower surface is opposite to the upper surface. The rectangular groove extends from the upper surface to the lower surface. The first metal layer is disposed on the upper surface. The second metal layer is disposed in the rectangular groove and electrically connected to the first metal layer.
57 Citations
13 Claims
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1. A circuit board, comprising:
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a plurality of dielectric layers; a plurality of signal lines; and a plurality of shielding walls, separated by the plurality of dielectric layers and disposed between the signal lines, wherein each shielding wall comprises; an upper surface; a lower surface opposite to the upper surface; a groove extending from the upper surface toward the lower surface, wherein each of the plurality of signal lines extends along a longitudinal direction parallel to a longitudinal axis of the groove of each shielding wall without extending within the groove of each shielding wall; a first metal layer disposed on the upper surface, wherein the first metal layer and the plurality of signal lines are located at a same layer; a second metal layer disposed inside the groove and electrically connecting to the first metal layer; a middle metal layer disposed between the upper surface and the lower surface, wherein the second metal layer electrically connects the first metal layer to the middle metal layer; and wherein the first metal layer is a ground shielding layer or a power shielding layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification